Table 1 Characteristics of 123 randomised controlled trials (RCTs) included in this review—note that more than one speciality may have been recorded for a RCT
From: Reporting of PPI and the MCID in phase III/IV randomised controlled trials—a systematic review
Trial characteristics | Number (%), n = 123 |
|---|---|
Phase | |
Phase III | 119 (97%) |
Phase IV | 4 (3.3%) |
Recruitment region | |
Single centre | 48 (39%) |
Multi centre | 75 (61%) |
Mean sample size | 367 (SD = 555) |
Median sample size | 156 (range = 50 to 4509) |
Type of intervention | |
Medical | 111 (90%) |
Surgical | 12 (10%) |
Speciality | |
Oncology | 26 (21%) |
Gastrointestinal | 16 (13%) |
Neurology | 12 (9.8%) |
Anaesthetics | 11 (8.9%) |
Gynaecology | 11 (8.9%) |
Nutrition | 11 (8.9%) |
Cardiology | 10 (8.1%) |
Respiratory | 10 (8.1%) |
Psychiatry | 10 (8.1%) |
Alternative medicine | 9 (7.3%) |
Endocrinology | 9 (7.3%) |
Infectious diseases | 8 (6.5%) |
Obstetrics | 8 (6.5%) |
Haematology | 7 (5.7%) |
Rheumatology | 7 (5.7%) |
Orthopaedics | 6 (4.9%) |
Ear, nose, and throat | 4 (3.3%) |
Ophthalmology | 4 (3.3%) |
Renal | 4 (3.3%) |
Dermatology | 3 (2.4%) |
Urology | 3 (2.4%) |
Public health | 2 (1.6%) |
General practice | 1 (0.81%) |
Plastics | 1 (0.81%) |
Sexual health | 1 (0.81%) |
Sleep | 1 (0.81%) |
Transplant | 1 (0.81%) |